Yarn tensioning device



y 1934- L. H. MYERS 1,967,210

YARN TENSIONING DEVICE Filed April 26, 1935 2 Sheets-Sheet l INVENTOR: Lewis 12? Myers,

@ ziw M W A TTORNEYS.

Jqly 17, 1934. MYERS 1,967,210

YARN TENSIONING DEVICE Filed April 26, 1933 2 Sheets-Sheet 2 FIG 11 ZAF 26 I j Z5 WITNESSES: INVENTOR:

(3 a LewisliMyers,

mama July 11, 1 934 1 1,9

UNITED STATES PATENT'OFFICE" YARN TENSIONING DEVICE uwis'n. Myer Philadelphia, 1a., assignor to Provident Trust Company of Philadelphia,

. Philadelphia, Pa., a corporation of Pennsyl vania, trustee Application April 26, 1933, Serial No. 687,943 I 9 Claims. (Cl. 242-154) A This invention relates to yarn tensioning de- Fig. IV shows the device in side elevation or as vices for winding machines; and it has reference viewed from the right in Fig. III. more particularly to tensioning devices especially With more detailed reference first more paradvantageous in winding yarns which have been ticularlyto Fig. I of these illustrations, the nu- 5 moistened for acquisitionof greater ,pliability so metal 5 designates the housing of the winding 60 that they may be more readily worked incident machine, which, at the top, affords journal sup-e to manufacture, .for example, of knitted products port for a spindle 6 whereon the conical yarn such as stockings. package C is formed. Suitable means (not In the operation of winding machines ordishown) serve to drive the spindle 6 at a rapid in narily employed in packaging yarns for use in constant speed. Incident to winding, the yarn 65 knitting machinery, the packages are formed by indicated at Y is directed over a threading bail the yarns on spindles which revolve at a '7 to a traversing guide 8 on a carriage 9. This constant speed. Accordingly therefore during carriage 9 is supported by a swinging frame 10 the winding of each package, the linear speed of which is fulcrum'ed at 11 on the housing 5 of the the yarn increases gradually in direct proportion machine, and is reciprocated longitudinally of 70 to the increase in diameter of the growing packthe spindle 6 by suitable means so that the yarn age. In order to insure even winding and uni- Y is distributed over the length of the package for-m density in the package under these condi- C by the traversing guide 8 in the well known tions, it is requisite during winding that the remanner. The frame 10 is counterstrain upon the yarnbe gradually decreased comweighted at 12 so that the traversing guide 8 is 75 pensatively with the progressively increasing yieldingly maintained at all times in contact with linear speed of said yarn consequent upon the the surface of the package C throughout each growth of the package. While different forms winding operation also as well understood in the of tension devices have been devisedheretofore art, v which quite satisfactorily accomplish this func- Referring now also to Figs. II, III and IV, it tion incident to winding dry yarns, I have found will be observed that my novel tensioning device th h y r unsuited to w d s yarn which comprises a bracket-plate 13 which is secured, have been moistened or wetted. by means of screws 14, to the end of a sup- The chief aim of my invention is to correct the porting arm 15 afforded by the winding m hi so deficiency to whichv attention has just been di- Enroute from a source of supply (not shown) rected, that is to say, its main object is to provide to the spindle 6, the yarn Y passes through a a simple, reliable and efficient device which is series of pig-tail guides 16, 1'7, 18 and 19 on the readily fitted to standard types of winding mabracket plate 13. As shown in Fig. IV, the guides chines and which will operate automatically to 16, 18 and 19 lie in a direct vertical line, while 35 mlintain Wet Well y yarn u d u m the guide 1'7 is somewhat offset laterally to detension irrespective of changes in the linear speed termine an angular deviation of the yarn Y at of the yarns incident to winding. 20. Intermediate the guides 1'7, 18, the yarn Y In connection with a tensioning device having passes between a pair of restraining members the above attributes, it is a further aim of my having the form of circumferentially-rounded 40 inventiontoprovide adjustments whereby the dedisks 21, 22 which are coaxially mounted on a vice may be adapted for operation upon yarns of stud 23 fixed, by means of aset-screw 24a, in a different materials and gages, and moreover boss 24 of thebracket plate 13. r whereby it may be set to maintain any desired In practice, the disk 21 is made of porcelain, degre'eof tension on the yarns. and formed, as shown in Figs. 11 and IILwith a 45 stillother objects and: attendant advantages forwardly projecting axial neck 25 which is of this invention will be manifest from the depierced to fit the stud 23. The disk 22, on the tailed'de'scription following of the attached drawother hand, is fashioned to dished configuration ings, wherein Fig. I shows in end elevation, a typifrom light sheet metal and centrally apertured to cal commercial winding machine known as a unifreely fit-the neck 25 of the disk 21. A conical so versal winder, fitted with myimproved automatic compressi n sp 6 yi ldi slv urges the disk tensioning device. r A v 22 toward the disk 21; so, that restraint is im- Pig. IIisa perspective view of the tension device posed up n h y Y s it P sses between the drawnto alarger scale. a opposing-surfaces of said disks. III-is a front elevation of the device like- Journaled in a bearing 27 of the bracket plate to drawntoalargerscalepand 13, is a transverse rock' shaft. 28 which. has seno cured to it at its front end, an extensible finger 29. As shown in Fig. III the extensible portion 30 of the finger 29 has its free end downturned to project into a longitudinal slot 31 at the outer end of the stud 23 to constitute a movable abutment for the conical spring 26. The compressive force of the spring 26 may be varied by adjusting the extensible portion 30 of the finger 29, a set screw 32 being provided for this pu pose. Pinned to the rock shaft 28 immediately adjacent the front side of the bearing 27 (i. e. at the left of the latter in Fig. IV) is a vertical arm 33. At its outer end the arm 33 carries a porcelain projection 34 for engaging the yarn Y and angularly deflecting it between the pig-tail guides 18, 19 as shown in Figs. I and III. A third arm 35 is secured to the rock shaft 28 immediately adjacent the rear side of the bearing 27 (i. e. the right hand side of the latter in Fig. IV), said arm being angularly set on the shaft and having its outer end bifurcated as at 36 to accommodate a circumferentially grooved roller 37. Within the groove of the roller 37 rests a lever 38 which is freely fulcrumed at 39 to a laterally projecting lug 40 of the bracket plate 13. As shown in Figs. I and HI, the lever 38 is engaged by the pierced end 41 of an angularly configured link 42 whereof the opposite end is pivoted at 43 to an extension piece 44 fixedly attached to the weight 12 of the swinging frame 10 of the winding machine. By shifting the block weight indicated at 45 along the lower horizontal portion 42a of the link 42 it is possible to vary the downward pressure exerted by the outer end 41 of said link upon the lever 38.

To the inner end of the rock shaft 28 is affixed an eccentrically bored disk weight 46 which may be set in any desired position of angular adjustment by means of a thumb screw 4'7. The clockwise swing of the rock shaft 28 is limited by a thumb screw 48 which is adjustable in an ear 49 projecting from the bearing 27 and which coacts with the arm 33. A jamb nut 50 with a milled edge is utilized as a convenient means for securing the thumb screw 48 against displacement after adjustment.

The operation of my improved tensioning device is as follows:As the diameter of the package C increases incident to its winding, the counterweighted frame 10 of the winding machine is moved clockwise on its fulcrum axis 11 in the known manner. By virtue of its connection to the swinging frame 10, the link 42 is drawn leftward in Figs. I and III. with attendant sliding of its pierced end 41 along the lever 38 toward the fulcrum 39 of the latter. The eifective pressure of the link 42 upon the lever 38 and in turn upon the roller arm 35, is thereby decreased so that the arm 35 will rise from the dot and dash line position to the full line position in Fig. I with attendant anti-clockwise movement of the rock shaft 28. As a consequence, the angle of diversion of the yarn Y between the pig-tail guides 18, 19 is decreased and the pressure between the disks 21, 22 reduced through easement of the tension of the spring 26. It therefore follows that the restraint upon the yarn Y is gradually lessened from the beginning of the winding operation until the package 0 on the spindle 6 attains its maximum size, or in other words, the drag on the yarn is compensatively varied inversely with the increase in linear speed so that a constant effective tension is maintained to insure uniform winding and distribution of the yarn on the package 0. During winding, the eccentric weighted disk 46 acts to stabilize the device against spasmodic operation. By virtue of provision of the various adjustments hereinbefore described, the device may obviously be set for winding yarns of different gages or weights or for predetermining any desired degree of tension.

It is to be understood that I do not consider myself limited to the precise details of construction herein illustrated and described since these are capable of modification within the scope of the appended claims.

Having thus described my invention, I claim:

1. A tensioning device for yarn winding machines, comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced fixed guides for directing the yarn in its passage; means for angularly diverting the yarn between the fixed guides; and means responsive to increase in the diameter of the yarn package being wound to concurrently regulate the pressure of the spring and to actuate the diverting means aforesaid for change in the angle of diversion, thereby to vary the restraint imposed upon the yarn.

2. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced guides for. directing the yarn in its passage; a rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm on said shaft having a projection in the interval between the guides aforesaid for angularly diverting the'yam; and means responsive to increase in the diameter of the yarn package being wound controlling movement of the shaft with attendant regulation of the spring aforesaid and actuation of the diverting arm. thereby to vary the restraint imposed on the yarn.

3. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm fixed on said shaft and having a projection thereon in the interval between the guides aforesaid to angularly divert the yarn; a roller arm also fixed to the rock shaft; a freely pivoted lever bearing on the roller of the arm; a link pivotally connected to the swinging frame of the winding machine which is moved as the diameter of the yarn package being wound increases, said link having its end resting on the lever aforesaid with capacity for sliding therealong for controlling movement of the shaft aforesaid for regulation of the spring and actuation of the diverting arm, thereby to vary the restraint imposed on the yarn.

4. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm fixed on said shaft and having a projection in the interval between the guides aforesaid to angularly divert the yarn;

a roller arm also fixed to the rock shaft; a freely pivoted lever bearing on the roller of the arm; a link pivotally connected to the swinging frame of the winding machine which is moved as the diameter of the yarn package being wound increases, said link resting on the lever aforesaid with capacity for sliding therealong to control movement of the shaft for regulation of the spring and actuation of the diverting arm, thereby to vary the restraint imposed on the yarn; and a weight adjustable along the link.

5. A tensioning device for yarn winding machines, comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a helical spring influential upon the restraining members; a pivoted adjustably extensible finger with an angularly bent end portion constituting a movable abutment for the spring; and means responsive to increase in the diameter of the yarn package being wound for controlling movement of the'finger to regulate the pressure of the spring and thereby vary the restraint imposed upon the yarn by the restraining members.

6. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm on said shaft with a projection in the interval between the guides aforesaid for angularly diverting the yarn; means responsive to increase in the diameter of the yarn package being wound for controlling movement of the shaft with attendant regulation of the spring and actuation of the diverting arm to vary the restraint imposed on the yarn; and stabilizing means to prevent spasmodic oscillations of the rock shaft.

7. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed en- .route to the winding spindle of the machine;

a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm on said shaft with a projection thereon movable in the interval between the guides aforesaid to. angularly divert the yarn; means responsive to increase in the diameter of the yarn -package being wound for controlling movement of the shaft with attendant regulation of the spring aforesaid and actuation of the diverting arm to vary the restraint imposed on the yarn; and adjustable means to limit the rocking movement of the shaft.

8. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine; a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm on said shaft with a projection thereon extending into the interval between the guides aforesaid to angularly divert the yarn; means responsive to increasein the diameter of the yarn package being wound for controlling movement of the shaft with attendant regulation of the spring aforesaid and actuation of the diverting arm to vary the restraint imposed on the yarn; and an eccentric disk weight ad justable on the rock shaft to stabilize the device against spasmodic operation.

9. A tensioning device for yarn winding machines comprising a pair of opposing restraining members between which the yarn is passed enroute to the winding spindle of the machine;

a spring influential upon the restraining members; a pair of spaced guides for directing the yarn in its passage; a transverse rock shaft; a finger on said shaft constituting a movable abutment for the spring; an arm fixed on said shaft and having a projection to engage and angularly divert the yarn in the interval between the guides aforesaid; a roller arm also fixed to the rock shaft; a freely pivoted lever resting on the roller of the roller arm; a link pivotally connected to a swinging frame of the winding machine which moves as the diameter of the yarn package being wound increases, said link resting in turn upon the lever aforesaid with capacity for sliding therealong for controlling movement" of the shaft for regulation of the spring and actuation of the di-- verting arm to vary the restraint imposed on the yarn; and an eccentric disk weight adjustably set on the shaft to stabilize the device against spasmodic operation.

LEWIS H. MYERS. 

